Counting unit cubes in a larger cube: How many 10 cm × 10 cm × 10 cm cubes fit in a cube of edge 1 m?
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A10
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B100
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C1000
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D10000
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E500
Answer
Correct Answer: 1000
Explanation
Introduction / Context:Partitioning a big cube into equal smaller cubes reduces to counting how many fit along each edge, then cubing that count (since the arrangement is 3D).
Given Data / Assumptions:
- Big cube edge = 1 m = 100 cm
- Small cube edge = 10 cm
- Number per edge = 100 / 10 = 10
Concept / Approach:Total small cubes = (number per edge)^3 = 10^3 = 1000.
Step-by-Step Solution:Along each edge: 10 cubesTotal: 10 * 10 * 10 = 1000
Verification / Alternative check:Volume ratio method: (100^3) / (10^3) = 1,000,000 / 1000 = 1000, consistent.
Why Other Options Are Wrong:10 and 100 count 1D/2D tilings, not 3D; 10000 is 10,000 which is 10^4, too large; 500 is arbitrary.
Common Pitfalls:Forgetting the third dimension; mixing cm with m without converting; dividing volumes but forgetting cubes must tile exactly (they do here).
Final Answer:1000